2019MNRAS.483..565C


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST00:18:38

2019MNRAS.483..565C - Mon. Not. R. Astron. Soc., 483, 565-592 (2019/February-2)

GRRMHD simulations of tidal disruption event accretion discs around supermassive black holes: jet formation, spectra, and detectability.

CURD B. and NARAYAN R.

Abstract (from CDS):

We report results from general relativistic radiation magnetohydrodynamics (GRRMHD) simulations of a super-Eddington black hole (BH) accretion disc formed as a result of a tidal disruption event (TDE). We consider the fiducial case of a solar mass star on a mildly penetrating orbit disrupted by a supermassive BH of mass 106M_☉, and consider the epoch of peak fallback rate. We post-process the simulation data to compute viewing angle-dependent spectra. We perform a parameter study of the dynamics of the accretion disc as a function of BH spin and magnetic flux, and compute model spectra as a function of the viewing angle of the observer. We also consider detection limits based on the model spectra. We find that an accretion disc with a relatively weak magnetic field around the BH [so-called SANE (Standard and Normal Evolution) regime of accretion] does not launch a relativistic jet, whether or not the BH is rotating. Such models reasonably reproduce several observational properties of non-jetted TDEs. The same is also true for a non-rotating BH with a strong magnetic field (magnetically arrested accretion disc, MAD regime). One of our simulations has a rapidly rotating BH (spin parameter 0.9) as well as a MAD accretion disc. This model launches a powerful relativistic jet, which is powered by the BH spin energy. It reproduces the high-energy emission and jet structure of the jetted TDE Swift J1644 + 57 surprisingly well. Jetted TDEs may thus correspond to the subset of TDE systems that have both a rapidly spinning BH and MAD accretion.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - black hole physics - MHD - radiative transfer - gamma-rays: galaxies - X-rays: galaxies

Simbad objects: 9

goto Full paper

goto View the reference in ADS

Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 384 2
2 ASASSN -14ae SN* 11 08 40.11 +34 05 52.4           ~ 75 0
3 SWIFT J1112.2-8238 X 11 11 47.797 -82 38 44.71           ~ 40 0
4 LEDA 43234 G 12 48 15.2244073438 +17 46 26.496619532   16.5       ~ 163 0
5 3XMM J152130.7+074916 X 15 21 30.7 +07 49 16           ~ 8 0
6 GRB 110328A gB 16 44 49 +57 34.9           ~ 350 0
7 ASASSN -15oi SN* 20 39 09.096 -30 45 20.71           ~ 68 0
8 SWIFT J2058.4+0516 X 20 58 19.898 +05 13 32.25           ~ 106 0
9 SN 2015L ? 22 02 15.45 -61 39 34.6           ~ 117 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2019MNRAS.483..565C and select 'bookmark this link' or equivalent in the popup menu


2021.05.06-00:18:38

© Université de Strasbourg/CNRS

    • Contact